Rein CHE0542 Engine Coolant Hose - Thermostat To Cylinder Head

OE Coolant Hose for BMW Cooling Repair

Rein CHE0542 is an OE-quality engine coolant hose built for European cooling systems that require an exact replacement. It matches the original hose shape and branch design, with thermoplastic quick-connect fittings for a direct service fit on BMW applications.

Use this BMW coolant hose when you need a clean replacement for the thermostat-to-cylinder-head coolant line on select 2012-2018 BMW 320i, 328i, 528i, X1, X3, X4, X5, Z4, 228i, and 428i models.

Key Features

• Direct replacement design reduces installation time.
• No cutting, refitting, or hose adjustment required.
• Thermoplastic quick-connect fittings help prevent leaks from reused connectors and O-rings.
• EPDM hose construction resists heat, salt, road debris, oil, and other contaminants.
• Built to SAE J20R4D1 industry standards.
• Black finish with OE-style dimensions and routing.

Detailed Description

Rein CHE0542 is engineered as a replacement water hose for BMW cooling system service where the original hose runs from the thermostat to the cylinder head. The hose is designed to mirror the OE part in size, branch geometry, and connector style, helping maintain proper coolant routing and a secure seal. This makes it a practical choice for BMW 320i coolant hose replacement, BMW 328i coolant hose replacement, and other listed BMW applications where an exact-fit hose is required.

The EPDM construction is selected for durability in high-temperature engine bay conditions, while the quick-connect ends support a cleaner repair than reworking an aged hose assembly. Rein CHE0542 also cross-references BMW 11537603514 for the same application.

What This Hose Helps Address

• Coolant leaks at worn hose connections.
• Cracked or heat-aged rubber hose sections.
• Leak recurrence from reused quick connectors or O-rings.
• Improper fit after attempting to modify a non-OE hose.
• Cooling system service on BMW thermostat-to-cylinder-head hose routing.

Installation Notes and Tips

Confirm the vehicle’s engine cooling hose routing before installation and compare the original hose shape, connector style, and end dimensions to the replacement. This hose is application-specific, so it should be installed on the listed BMW models and positions only. Inspect mating surfaces, quick-connect locks, and sealing rings during service to help ensure a proper seal.

Quality Assurance

Rein Automotive OE-quality hoses are built for European vehicles using OE-style construction and fitment standards. CHE0542 is manufactured to support direct replacement service on the listed BMW applications and is produced to SAE J20R4D1 requirements.